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Title: Quartz-based flat-crystal resonant inelastic x-ray scattering spectrometer with sub-10 meV energy resolution

Journal Article · · Scientific Reports
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1]
  1. Argonne National Lab. (ANL), Lemont, IL (United States). Advanced Photon Source (APS)
  2. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Dept. of Physics; Inst. for Basic Science (IBS), Pohang (Korea, Republic of). Center for Artificial Low Dimensional Electronic Systems; Max Planck Inst. for Solid State Research, Stuttgart (Germany)

Continued improvement of the energy resolution of resonant inelastic x-ray scattering (RIXS) spectrometers is crucial for fulfilling the potential of this technique in the study of electron dynamics in materials of fundamental and technological importance. In particular, RIXS is the only alternative tool to inelastic neutron scattering capable of providing fully momentum resolved information on dynamic spin structures of magnetic materials, but is limited to systems whose magnetic excitation energy scales are comparable to the energy resolution. The state-of-the-art spherical diced crystal analyzer optics provides energy resolution as good as 25 meV but has already reached its theoretical limit. For this study, we demonstrate a novel sub-10 meV RIXS spectrometer based on flat-crystal optics at the Ir-L3 absorption edge (11.215 keV) that achieves an analyzer energy resolution of 3.9 meV, very close to the theoretical value of 3.7 meV. In addition, the new spectrometer allows efficient polarization analysis without loss of energy resolution. The performance of the instrument is emonstrated using longitudinal acoustical and optical phonons in diamond, and magnon in Sr3Ir2O7. The novel sub-10 meV RIXS spectrometer thus provides a window into magnetic materials with small energy scales.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1426719
Journal Information:
Scientific Reports, Vol. 8, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (8)

Ultrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective
  • Cao, Y.; Mazzone, D. G.; Meyers, D.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2145 https://doi.org/10.1098/rsta.2017.0480
journal April 2019
Spin-gap and two-dimensional magnetic excitations in Sr 2 IrO 4 journal December 2018
Pseudospin-lattice coupling in the spin-orbit Mott insulator Sr 2 IrO 4 journal February 2019
X-ray back-diffraction: can we further increase the energy resolution by tuning the energy slightly below that of exact backscattering? journal October 2019
Performance of quartz- and sapphire-based double-crystal high-resolution (∼10 meV) RIXS monochromators under varying power loads journal May 2018
Resonant inelastic X-ray scattering of magnetic excitations under pressure journal August 2019
Performance of quartz- and sapphire-based double-crystal high-resolution (∼10 meV) RIXS monochromators under varying power loads text January 2018
Ultrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective text January 2018